Jest vs pre-commit by Yelp

Jest vs pre-commit by Yelp: What are the differences?

Jest: Painless JavaScript Unit Testing. Jest provides you with multiple layers on top of Jasmine; pre-commit by Yelp: A framework for managing and maintaining multi-language pre-commit hooks. If one of your developers doesn’t have node installed but modifies a JavaScript file, pre-commit automatically handles downloading and building node to run jshint without root. Pre-commit is a multi-language package manager for pre-commit hooks. You specify a list of hooks you want and pre-commit manages the installation and execution of any hook written in any language before every commit. pre-commit is specifically designed to not require root access.

Jest belongs to "Javascript Testing Framework" category of the tech stack, while pre-commit by Yelp can be primarily classified under "Git Tools".

Some of the features offered by Jest are:

• Familiar Approach: Built on top of the Jasmine test framework, using familiar expect(value).toBe(other) assertions
• Mock by Default: Automatically mocks CommonJS modules returned by require(), making most existing code testable
• Short Feedback Loop: DOM APIs are mocked and tests run in parallel via a small node.js command line utility

On the other hand, pre-commit by Yelp provides the following key features:

• node
• python
• ruby

Jest and pre-commit by Yelp are both open source tools. Jest with 26.1K GitHub stars and 3.53K forks on GitHub appears to be more popular than pre-commit by Yelp with 3.04K GitHub stars and 231 GitHub forks.